US1960634A - Manufacture of artificial fibers - Google Patents

Manufacture of artificial fibers Download PDF

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Publication number
US1960634A
US1960634A US472472A US47247230A US1960634A US 1960634 A US1960634 A US 1960634A US 472472 A US472472 A US 472472A US 47247230 A US47247230 A US 47247230A US 1960634 A US1960634 A US 1960634A
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US
United States
Prior art keywords
draught
spinning
roller
thread
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US472472A
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English (en)
Inventor
Kampf Adolf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Application granted granted Critical
Publication of US1960634A publication Critical patent/US1960634A/en
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/223—Stretching in a liquid bath
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/228—Stretching in two or more steps, with or without intermediate steps

Definitions

  • My present invention relates to the manufacture of artificial silk and more particularly to a specific stretching operation to which the threads are subjected on their way from the spinning nozzle to the collecting device.
  • Fig. 1 is a front view in which the threads are collected on a bobbin.
  • the first phase of draught occurs between the spinning nozzle and the first roller 4, and the second phase between the two rollers 4 and 5. If, for instance, the discharge velocity from the nozzle amounts to 20 meters and the peripheral speed of the roller 4 to 25 meters, the partial draught in the first phase will be 1.25; if, furthermore, the peripheral speed of the roller 5 is, for instance, 40 meters, the partial draught between the rollers 4 and 5 is 1.6 and the total draught between the spinning nozzle and the roller 5 amounts to 2.
  • the present invention is based on the important observation that in the wet spinning of cellulose solutions the best fibers are generally obtained by keeping the partial draught of the first phase as tion is intended to indicate a correspondent operation as performed in spinning natural fibers. In the present case it indicates the quotient:
  • partial draught indicates a correspondent quotient of the velocity with which the thread is guided away by one part of the machine and of the velocity with which it is delivered from the foregoing part.
  • the decisive draught for the final product is produced by the second roller 5, whereat the thread is stretched in a correspondent strong manner.
  • the roller 5 is only used as draught roller and another third spool or roller 7 is inserted as a collecting device having approximately the same or, if necessary, a somewhat increased peripheral velocity as compared with the second roller 5.
  • the thread is thus collected by the receiving device 7 while being only moderately stretched.
  • This receiving device may also be constructed so as to serve as a delivery roller for a centrifuge which is mounted behind it.
  • the conditions of draught are such that the thread is drawn off from the nozzle with a speed which is smaller than that with which it leaves the nozzle. This result may even be obtained when the thread is collected by the receiving device with a speed inferior tothat with which the spinning liquid is ejected from the nozzle, so that both'the partial draught in the first phase between the nozzle and the first draught roller 4' and the total draught are less than 1.
  • the bath may contain, for instance, 5 per cent of sodium sulfate which cannot be avoided in spinning.
  • the passage through the bath may be 25 cm., the passage through the air to the first draught roller 20 cm., the partial draught between the nozzle and the first draught roller 0.4, the partial draught between the first and the second draught roller2 and consequently the total draught 0.8.
  • the distance of air between the two draught rollers may be 30 cm.
  • This mode of operating permits of producing with great regularity artificial silk threads of finest individual titen having a tenacity of 3.5 g. and more pro denier.
  • the precipitating bath and other spinning conditions it may be advantageous to, continuously treat the thread on one of the draught rollers or on the receiving device with a washing liquid either by immersing the spool in a suitable bath or by irrigating it by said washing liquid.
  • a washing liquid either by immersing the spool in a suitable bath or by irrigating it by said washing liquid.
  • My invention is not limited to tne example given or to the specific details mentioned therein. It is obvious that other viscose solutions which may be ripened or which may contain another amount of cellulose make necessary another mode of operation with respect to the draught executed on the freshly coagulated threads. The same holds true with respect to the composition of the precipitating bath.
  • inventive idea of my present specification may be employed when spinning threads from other cellulose solutions according to the wet spinning process as, for instance, according to the cupro-ammcniurn spinning process. Or I may divide the total draught into more phases by guiding the thread over a corresponding plurality of draught rollers.
  • a few simple comparative experiments should be made to determine the best performance of my invention with a particular viscose or precipitating bath and I contemplate as included within my-invention all such modifications as fall within the scope of the appended claims.
  • the .step which comprises acting upon the thread between the spinning nozzle and the first draughting device with a draught of at least 0.25, but smaller than 1, said draught being indicated by'the quotient: peripheral velocity of the first draught roller discharge velocity of the spimiing mass.
  • the step which comprises acting upon the thread between the spinning nozzle and the collecting device with a total draught of at least 0.25, but smaller than 1, said draught being indicated by the quotient: winding speed of the collecting device discharge velocity of the spinning mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
US472472A 1929-08-14 1930-08-01 Manufacture of artificial fibers Expired - Lifetime US1960634A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE356427X 1929-08-14

Publications (1)

Publication Number Publication Date
US1960634A true US1960634A (en) 1934-05-29

Family

ID=6290274

Family Applications (1)

Application Number Title Priority Date Filing Date
US472472A Expired - Lifetime US1960634A (en) 1929-08-14 1930-08-01 Manufacture of artificial fibers

Country Status (4)

Country Link
US (1) US1960634A (enrdf_load_stackoverflow)
FR (1) FR700631A (enrdf_load_stackoverflow)
GB (1) GB356427A (enrdf_load_stackoverflow)
NL (1) NL30013C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
GB356427A (en) 1931-09-10
FR700631A (fr) 1931-03-05
NL30013C (enrdf_load_stackoverflow)

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